Rhino beetle rolling a mesh dung ball, includes a whole version and separate files for just the beetle (in abdomen and torso, same pose) and the ball.

scarab-dung.stl - 12.8mb (whole model)

cut-body.stl - 12.2mb (body in two separate pieces)

cut-ball.stl - 750kb (only the ball)

Default length has been scaled to ~10cm